Clear vision device



May 5, 1931. J. w. BoUR CLEAR VISION DEVICE Filed July 24. 1929 Patented May 5, 1931 UNITED STATES JOHN BOUIR, F LOS ANGELES, CALIFORNIA CLEAR VISION DEVICE Application led July 24,

This invention appertains to transparent panes used in vehicle windshields, windows or any similar closure exposed to the elements and one of the primary objects of the invention is to provide novel means for incorporating a heating element within a transparent pane for preventing the collection of snow, rain, condensation or any moisture thereon, thereby insuring clear vision therethrough at all times.

Another important object of my invent1on is the provision of novel transparent spacing strips interposed between a pair of transparent panes, the strips being spaced to form passagewa-ys for the reception of a resistance Wire used for heating purposes, the spacing strips acting as a filler and strengthening means for the panes as well as spacers for the various portions of the resistance element.

A further object'of m invention is the provision of novel means or incorporating a burglar alarm in the heating circuit, for causing sounding of the alarm should the pane or resistance element be broken.

Still another object of the invention is to provide an improved device of the above character which will be durable and efticient in use, one that will be simple and easy to manufacture, and one which can be placed on the market at a reasonable cost.

With these and other objects in view, the invention consists in the novel construction, arrangement and formation of parts, as will be hereinafter more specifically described, claimed, and illustrated in the accompanying drawing, in which drawing:

Figure 1 is a front elevation of a windshield constructed in accordance with my invention showing parts thereof broken away and in section.

Figure 2 is a vertical section through the windshield taken on the line 2 2 of Figure l looking in the direction of the arrows.

Figure 3 is a front elevation ot a window constructed in accordance with my invention with parts thereof broken away and in section `and illustrating the novel means employed for; connecting a burglar alarm therewith; an

Figure 4 is a fragmentary vertical section 1929. Serial No. 380,611.

taken on the line 4-4 of Figure 3 looking in the direction of the arrows.

Referring to the drawing in detail, wherein similar reference characters designate corresponding parts throughout the several views, the letter generally indicates a vehicle windshield, which, in accordance with ing element. This resistance wire is placed '7 or confined in the passagcways 9 and leads from one passageway to the other as clearly shown in Figure l of the drawing so that the entire area of the windshield will be heated thereby when a circuit is closed there- 'l through. 'lhe opposite terminals of the resistance wire are connected to eedtand return wires ll and 12 which can lead to a suitable source ot electrical energy. 'lihese wires are preferably led through an 'opening or eyelet 13 formed in the frame 7 of the windshield.

ln the manufacture of the windshield, I prefer to run straight lengths of wire in the passageways 9 and have the ends of the strips 8 staggered or alternately terminating short of the opposite ends ot the panes to provide Y end passageways 14tinto which the terminals of the straight lengths of wire are led. rlhese terminals are then connected together in any desired way such as by the use of solder or the like.

lt is obvious 'that qby thisl construction a durable and ecient windshield is provided which will prevent the collection of moisture, snow er ice thereonu My invention is applicable for use in connectien with any pane exposed to the elements and in Figure. il l have illustrated my inventien incorporated with a. conventional window sash B including a frame 15. JThe frame 15 receives the inner and outer glass panes or plates 16 and 17 which are spaced by longitudinally extending transparent strips 18 of mica or the like. These strips are spaced relative to one another to receive resistance elements 19 in the same manner as the resistance element 10 described in Figures 1 and 2.

, In connection with a window or other closure I can employ a burglar alarm or the like 20. The feed and return wires of the resistance element 19 are indicated by the reference characters 21 and 22 in Figure 3 and are shown connected to the opposite terminals of a suitable source of electrical energy at 23. The wire 21 can have incorporated in the length thereof a suitable control switch 24.

The burglar alarm 20 may comprise a relay including an electro-magnet 25 which is incorporated in the length of the wire 22. The magnet 25 normally attracts, when energized, a pivoted armature 26 and when the magnet is de-energized the armature is moved to a raised position by an expansion coil spring 27. Disposed in the path of the pivoted armature is av contact 28 and the armature and the contact have attached thereto wires 29 and 30. The wire 29 has incorporated in the length thereof an electric bell 31 or other suitable alarm and this wire then leads to one terminal for a suitable source of energy 32. The wire 30 leads to the other terminal of said source of electrical energy. A switch 33 may also be incorporated in the length of the wire 29 for opening and closing the circuit therethrough manually.

In use of the burglar alarm, when a circuit is closed through the resistance element 19 the magnet 25 will be energized causing the armature 26 to move downward away from the contact 28, thus interrupting the flow of currentthrough the alarm or signal 31. However in case of breakage of the resistance element at any point the circuit therethrough will be broken and consequently the magnet 25 willbe de-energized, thus allowing raising of the armature into engagement with the contact 28 by the spring 27. This will close the circuit through the signal or alarm 31 and will give the alarm.

to the opposite terminals thereof and extending from said panels.

2. A transparent panel for windshields, windows and other closures comprising a pair of spaced companion transparent panes, transparent strips disposed between and en- 4gagin said panes and arranged in slightly JOHN W. BOUR. 

